Compatibility: 3.0+
Expects: AX    0101H
DS:DX addr of an AddFileRec (see below) describing file to enqueue
                                                                  
Returns: AX    error code (if CF=CY)
                                                                  
Info: Enqueues a file for background printing (only if PRINT.EXE is
resident in memory.

DS:DX is the address of a data packet formatted as follows:

AddFileRec
Offset Size Contents
                                                               
+0      1  bLevel         must be 00H)
+1      4  pfszFilespec   Far address of an ASCIIZ  filespec
of the file to print.  No wildcards.
5                 size of an AddFileRec

Note: A Microsoft Technote warns users of this fn to use only "well-
formed" (fully-qualified) filespecs of files that already exist.
PRINT does not perform error checking.

- -

INT 2fH 0101H: Submit File to Spooler